{"?xml":{"@version":"1.0"},"edm:RDF":{"@xmlns:dc":"http://purl.org/dc/elements/1.1/","@xmlns:edm":"http://www.europeana.eu/schemas/edm/","@xmlns:wgs84_pos":"http://www.w3.org/2003/01/geo/wgs84_pos","@xmlns:foaf":"http://xmlns.com/foaf/0.1/","@xmlns:rdaGr2":"http://rdvocab.info/ElementsGr2","@xmlns:oai":"http://www.openarchives.org/OAI/2.0/","@xmlns:owl":"http://www.w3.org/2002/07/owl#","@xmlns:rdf":"http://www.w3.org/1999/02/22-rdf-syntax-ns#","@xmlns:ore":"http://www.openarchives.org/ore/terms/","@xmlns:skos":"http://www.w3.org/2004/02/skos/core#","@xmlns:dcterms":"http://purl.org/dc/terms/","edm:WebResource":[{"@rdf:about":"http://www.dlib.si/stream/URN:NBN:SI:doc-CF4AG18L/fb94e0a7-60a2-4fb0-8b06-00e349be08de/HTML","dcterms:extent":"27 KB"},{"@rdf:about":"http://www.dlib.si/stream/URN:NBN:SI:doc-CF4AG18L/ed3804dd-6899-4f7f-ad91-82198166c6a2/PDF","dcterms:extent":"485 KB"},{"@rdf:about":"http://www.dlib.si/stream/URN:NBN:SI:doc-CF4AG18L/5f79d3fb-90e9-4925-9e9e-aa83467c98f2/TEXT","dcterms:extent":"22 KB"}],"edm:TimeSpan":{"@rdf:about":"1999-2025","edm:begin":{"@xml:lang":"en","#text":"1999"},"edm:end":{"@xml:lang":"en","#text":"2025"}},"edm:ProvidedCHO":{"@rdf:about":"URN:NBN:SI:doc-CF4AG18L","dcterms:isPartOf":[{"@rdf:resource":"https://www.dlib.si/details/URN:NBN:SI:spr-6QOUKQ9A"},{"@xml:lang":"sl","#text":"Strojniški vestnik"}],"dcterms:issued":"2008","dc:creator":["Fernandez, Angel","Javierre, Carlos","Mercado, Daniel","Muniesa, Manuel"],"dc:format":[{"@xml:lang":"sl","#text":"številka:4"},{"@xml:lang":"sl","#text":"letnik:54"},{"@xml:lang":"sl","#text":"8 strani"},{"@xml:lang":"sl","#text":"str. 258-265"}],"dc:identifier":["ISSN:0039-2480","COBISSID:10530075","URN:URN:NBN:SI:doc-CF4AG18L"],"dc:language":"en","dc:publisher":[{"@xml:lang":"sl","#text":"Association of Mechanical Engineers and Technicians of Slovenia et al."},{"@xml:lang":"sl","#text":"Zveza strojnih inženirjev in tehnikov Slovenije et al."}],"dc:subject":[{"@xml:lang":"sl","#text":"brizganje"},{"@xml:lang":"sl","#text":"polimeri"},{"@xml:lang":"sl","#text":"poliolefini"},{"@xml:lang":"sl","#text":"šobe"},{"@xml:lang":"sl","#text":"temperatura"},{"@xml:lang":"sl","#text":"tlak"},{"@xml:lang":"sl","#text":"viskoznost"},{"@rdf:resource":"http://www.wikidata.org/entity/Q81163"}],"dcterms:temporal":{"@rdf:resource":"1999-2025"},"dc:title":{"@xml:lang":"sl","#text":"Large thermoplastic parts quality improvements using monitorized nozzle|"},"dc:description":[{"@xml:lang":"sl","#text":"Rheological behaviour control of thermoplastic material is critical to achieve reliable production series free of defects such us flashes or short shots. Defects are especially critical when injecting large parts if stability of processing parameters cannot be achieved. Viscosity variation during production depends specially of lot of raw material and programmed parameters concerning temperature. Understanding rheological behaviour of molten material in injection nozzle is critical to obtain repetitive series of large parts free of defects. In this article apparent viscosity was obtained using monitorized nozzle and used as an input to MoldFlow analysis to predict defects. The Simulation model included a two different cavities mould for washing machine tubs made of talc filled polypropylene, hot runner manifold and the machine nozzle. To validate analysis several complete series of parts were injected using a nozzle with two pressure and temperature sensors in a heated thick cylindrical channel, and a screw displacement sensor. Previously the nozzle was validated testing the effect of pressure losses with shear rate variation; apparent viscosity with pressure variations; and others such us viscous heating of polymer. Part defects were characterized using statistical analysis of registered parameters during filling and packing phase of the mould. Simulations of identical experimental parameters for correct and failed parts were used to validate results and characterized the defects"},{"@xml:lang":"sl","#text":"Nadzor nad reološkim vedenjem termoplastičnega materiala je kritičen pri zagotavljanju zanesljive proizvodnje brez napak kot so prelitje ali nepopolno zabrizganje. Te napake so se posebej kritične pri brizganju velikih izdelkov, če ne moremo zagotoviti stalnih postopkovnih parametrov. Nihanja v viskoznosti med proizvodnjo so odvisna predvsem od izbranega materiala in vnaprej programiranih temperaturnih parametrov. Razumevanje reološkega vedenja taline v brizgalni sobi je kritično pri zagotavljanju velikih serij velikih izdelkov brez napak. V tem prispevku je bila dejanska viskoznost pridobljena z nadzorovano brizgalno sobo in potem uporabljena kot vhodni podatek za MoldFlow analizo za predvidevanje napak. Simulacijski model je vključeval dve različni orodni votlini kadi za pralni stroj iz polipropilena, polnjenega s smukcem (kalcijev karbonat), vroče-kanalni sistem in strojno šobo. Za overitev analize se je brizgalo več serij s šobo pri dveh različnih tlakih in temperaturnim zaznavalom v gretem debelostenem valjnem kanalu ter s tipalom za pomik polža. Pred tem je bila soba umerjena z testiranjem vpliva izgube pritiska s spremembo strižnega razmerja: dejanska viskoznost s spremembo tlaka; ter drugimi testi kot so viskozno gretje polimera. Napake na izdelku so bile opisane s statističnimi obdelavami zajetih podatkov med zapolnjevanjem in delovanjem naknadnega tlaka v orodju. Simulacije enakih eksperimentalnih parametrov za dobre in slabe izdelke so bile uporabljene za ovrednotenje rezultatov in karakterizacijo napak"}],"edm:type":"TEXT","dc:type":[{"@xml:lang":"sl","#text":"znanstveno časopisje"},{"@xml:lang":"en","#text":"journals"},{"@rdf:resource":"http://www.wikidata.org/entity/Q361785"}]},"ore:Aggregation":{"@rdf:about":"http://www.dlib.si/?URN=URN:NBN:SI:doc-CF4AG18L","edm:aggregatedCHO":{"@rdf:resource":"URN:NBN:SI:doc-CF4AG18L"},"edm:isShownBy":{"@rdf:resource":"http://www.dlib.si/stream/URN:NBN:SI:doc-CF4AG18L/ed3804dd-6899-4f7f-ad91-82198166c6a2/PDF"},"edm:rights":{"@rdf:resource":"http://rightsstatements.org/vocab/InC/1.0/"},"edm:provider":"Slovenian National E-content Aggregator","edm:intermediateProvider":{"@xml:lang":"en","#text":"National and University Library of Slovenia"},"edm:dataProvider":{"@xml:lang":"sl","#text":"Univerza v Ljubljani, Fakulteta za strojništvo"},"edm:object":{"@rdf:resource":"http://www.dlib.si/streamdb/URN:NBN:SI:doc-CF4AG18L/maxi/edm"},"edm:isShownAt":{"@rdf:resource":"http://www.dlib.si/details/URN:NBN:SI:doc-CF4AG18L"}}}}